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Does Cobicistat Interact with Ketoconazole?

CDI records a unknown classification for Cobicistat and Ketoconazole. The stored summary is: Antifungals: itraconazole ketoconazole ↑ itraconazole ↑ ketoconazole Specific dosing recommendations are not available for coadministration with itraconazole or ketoconazole. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.

Severity
Unknown
Cobicistat Class
Cytochrome P450 3A Inhibitor
Ketoconazole Class
Azole Antifungal
Management
Consult your pharmacist
Data Source
U.S. FDA via OpenFDA

What To Tell Your Doctor or Pharmacist

If you are taking Cobicistat and your doctor is considering prescribing Ketoconazole (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Never stop or change either medication without first consulting your healthcare provider
💊 Cobicistat(Tybost)+💊 Ketoconazole(T8 Keto Flush)

Severity & Interaction Details

ℹ️
unknown
Interaction documented — severity unclassified
The CDI record includes an interaction but its severity has not been classified.
Severity scale
MinorContra
On record
Yes
Drug A class
Cytochrome P450 3A Inhibitor
Drug B class
Azole Antifungal
Source
FDA drug label - cobicistat

What this means in plain English

Antifungals: itraconazole ketoconazole ↑ itraconazole ↑ ketoconazole Specific dosing recommendations are not available for coadministration with itraconazole or ketoconazole.

About Cobicistat and Ketoconazole

Cobicistat is a Cytochrome P450 3A Inhibitor, while Ketoconazole is an Azole Antifungal. You may recognize them by the brand names Tybost and Ketodan. Ketoconazole additionally carries an FDA boxed warning, the FDA's strongest safety alert.

Source and Limitations

This record was produced by automated extraction from drug-label information, including AI processing. The summary and mechanism are not verbatim FDA quotations. The drug profiles below may describe different formulations from the source label. Confirm the exact product and route with your pharmacist. This page does not establish independent clinical review.

📖 Source: FDA drug label - cobicistat

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How this information is prepared: CDI uses automated extraction, including AI, to summarize drug labeling from openFDA and includes separately identified curated-reference records. RxNorm helps identify medications; it does not verify interaction claims. Extracted summaries and CDI severity classifications can contain errors and are not verbatim FDA statements or independent clinical review. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.

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